Quick drying lacquer



STATES U ETE J:

LEAVITT N. BENT, 0F HOLLY OAK, DELAWARE, A$SIGNOR 'I O HERCULES POWDERCOM- PANY, OF WILMINGTON, DELAWARE, A CORPORATEQN OF DELAWABE QUICKDRYING LAceUEn No Drawing.

My invention relates to an improvement in lacquers and more particularlyto those lacquers including as an ingredient nitrocellu- The lacquerembodying my invention may include, in addition to nitrocellulose ornitrostarch and an alkyl or aryl'abietate, those ingredients such as areusually found in such lacquers, as, for example, gums, plasticizers,solvents, diluents, etc. I

As an example of a nitrocellulose lacquer including ethyl abietate andembodying my invention the following Will be illustrative Formula N0. 1p

7 Per cent Soluble nitrocotton 12.0

Denatured alcohol 5.0 Butyl acetate 26.5 Ethyl acetate 6.0 Butanol 5.0Toluol 26.0 Gum damar solution 9.5 Ethyl abietate 10.0

Formula N 0. 2

' Percent Soluble nitrocotton 10.5 Denatured alcohol; 4.5 Butyl acetate26.5 d Ethyl acetate 6.0

Butanol 5.0 Toluol "g 26.0 Plasticizer 5.0 Ethyl abietate 16.5

As an example of a nitrostarch lacquer in- Application filed March 22,1927. Serial No. 177,467.

eluding ethyl 'abietate and embodying my mi Formula N0. 3

1 Per cent Low viscosity nitrostarch Benzol 10 Butyl acetate 10 Butanol4 Denatured alcohol 5 Ester gum solution 15 gum f toluol) Toluol 4 Ethylabietate 12 The abietates for use in accordance with my invention may beprepared in any well known manner as, for example, from the silver saltof abietic acid and ethyl iodide, dimethyl sulphate and sodium abietate,the acid chloride and alcohol, or by refluxing an alcoholic solutionwith sulphuric acid. The alkyl esters of abietic acid may also beprepared from wood rosin, permissibly a brown wood rosin, by the processdescribed in the application for patent of Alan C. Johnston, Serial No.125,833, filed July 29, 1926, which consists in refluxing the rosin witha solution of caustic alkali diluted with alcohol until a clear solutionis obtained, then adding an alkyl sulphate and distilling ofi" thealcohol, and finally distilling oil the ester from the residue undervacuum.

The alkyl or aryl abietate when included in nitrocellulose lacquers actin some instances partially as plasticizers, since they have a slowcolloiding action on nitrocellulose and partially as gums, while inother instances they act merely as gums.

When an alkyl or aryl abietate is included ina nitrocellulose'ornitrostarch lacquer, the lacquer is quick drying, of superior qualityand produces a superior film and the abietates will withstand heatbetter than a so called ester gum or damar gum.

It will be understood that my invention is vention, the following willbeillustrative equally applicable to nitrocellulose and to nitrostarchlacquers and that when in the claims appended hereto I refer tonitrocellulose lacquers, I intend to include nitrostarch lacquers asequivalents.

Having noW fully described my invention, what I claim and desire toprotect by Letters Patent is 1. A nitrocellulose lacquer including as aningredient an alkyl abietate prepared from Wood rosin.

2. A nitrocellulose lacquer including as an ingredient an alkyl abietateprepared from rosin and a nionohydric alcohol.

3. A nitrocellulose lacquer including as an ingredient ethyl aloietate.

4. A nitrocellulose lacquer including as an ingredient an alkyl abietateprepared from 1 rosin and a monohydric aliphatic alcohol.

5. A nitrocellulose lacquer including as an r I ingredient methylabietate.

6. A nitrocellulose lacquer including as an ingredient butyl abietate.

In testimony of which invention, I have hereunto set my hand, atWilmington, Del., on this 14th day of March, 1927.

LEAVITT N. BENT.

